As usual - far too simplistic
In my opinion, the creation of Pakistan had far more to do with Britain's chaotic departure from India than 'religious differences' which was part of the Empire's excuse for not giving it's seized nations independence '
I greaw up with the claim "they are not ready for self-rule" ringing in my ears
Below make far more sense to me - the legacy of "an Emipre on which the sun never set nor the blood ever dried"
Jim Carroll

Reasons for partition
India and Pakistan won independence in August 1947, following a nationalist struggle lasting nearly three decades. It set a vital precedent for the negotiated winding up of European empires elsewhere. Unfortunately, it was accompanied by the largest mass migration in human history of some 10 million. As many as one million civilians died in the accompanying riots and local-level fighting, particularly in the western region of Punjab which was cut in two by the border.
The agreement to divide colonial India into two separate states - one with a Muslim majority (Pakistan) and the other with a Hindu majority (India) is commonly seen as the outcome of conflict between the nations' elites. This explanation, however, renders the mass violence that accompanied partition difficult to explain.
If Pakistan were indeed created as a homeland for Muslims, it is hard to understand why far more were left behind in India than were incorporated into the new state of Pakistan - a state created in two halves, one in the east (formerly East Bengal, now Bangladesh) and the other 1,700 kilometres away on the western side of the subcontinent [see map].
It is possible that Mohammed Ali Jinnah, leader of the Muslim League, simply wished to use the demand for a separate state as a bargaining chip to win greater power for Muslims within a loosely federated India. Certainly, the idea of 'Pakistan' was not thought of until the late 1930s.
One explanation for the chaotic manner in which the two independent nations came into being is the hurried nature of the British withdrawal. This was announced soon after the victory of the Labour Party in the British general election of July 1945, amid the realisation that the British state, devastated by war, could not afford to hold on to its over-extended empire.